spotlighting and bird's eyes

["Ashwin Rudder" <>]

g'day

i was spotlighting some White-throated Nightjars last October, when i began
to wonder what the bright beams of spotlights actually do to nightbirds, and
just bird in genral, eyes.
when humans look into a bright light for too long, they suffer permanent or
temporary eyesight damage. I was wondering if this is the same for night
birds?
also, is there a difference in damage between different bulbs, eg LED,
Xenon, Krypton, etc?
Which is easier for spotlighting and identification, as well?

Thanks in advance,

Ashwin
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